For serial connections, you must match baud rate, data bits, parity, and stop bits (typically 9600, 8, N, 1). Consult your POS software manual. For Ethernet, assign a static IP address to the printer via its built-in web interface or configuration utility, then add a "TCP/IP port" during driver installation.
Most POS environments run on Windows. Follow these steps after your is complete. Pos-9200-l Driver Download